Q. Consider the following compounds

Question

Order of basicity of these compounds in decreasing …… is

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Solution:

Basicity decreases as in the following order
Solution
Here (1) is more basic than (3) as in (3) oxygen atom is electron withdrawing. (2) is more basic than (4) as in (4) lone pair is delocalized. (3) and (4) are less basic than (1) and (2) due to more s%.